Non-invasive system and method for measuring an analyte in the body

A system for determining the concentration of an analyte in body fluid, the system comprising:

• an infrared light source delivering substantially monochromatic light sequentially across a predetermined wavelength range;
• a body tissue interface adapted to contact body tissue and to deliver light from said infrared light source to the contacted body tissue;
• a detector adapted to receive spectral information corresponding to infrared light transmitted through the contacted body tissue and to convert the received spectral information into an electrical signal indicative of the received spectral information;
• and
• a central processing unit adapted to compare the electrical signal to an algorithm built upon correlation with the analyte in the body fluid, the algorithm adapted to convert the received spectral information into the concentration of the analyte in the body fluid, said central processing unit controlling said infrared light source and varying the intensity and timing of the delivery of said monochromatic light within the predetermined wavelength range to improve the accuracy of conversion of the received spectral information into concentration of said analyte in said body fluid.